Antonym: sure. Similar words: insure, ensure, censure, censured, insurgent, insurance, in surprise, insurgence. Meaning: adj. 1. lacking or indicating lack of confidence or assurance 2. lacking self-confidence.
(151) Erin was unsure of her ability to rock the legging look, but I ensured her that she could do it no problem.
More similar words: insure, ensure, censure, censured, insurgent, insurance, in surprise, insurgence, commensurate, sure, insurrection, surety, for sure, assure, insurmountable, leisure, measure, health insurance, pleasure, exposure, treasure, pressure, to be sure, composure, make sure, measured, embrasure, treasurer, leisurely, measure up.